Bedienungsanleitung Cambridge Audio AZUR 851W (Seite 5 von 14) (Englisch)

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ENGLISH

Rear panel connections

1. Loudspeaker terminals

For normal wiring, connect the wires from your left channel loudspeaker

to the LEFT + & - terminals, and the wires from the right channel

loudspeaker to the RIGHT + & - terminals. In each case, the red terminal

is the positive output and the black terminal is the negative output.

Other dual mono schemes are also possible if two 851Ws are used.

Refer to later sections of this manual for more information.

Use speakers with a nominal impedance of between 4-8 ohms. Care

should be taken to ensure no stray strands of wire short the loudspeaker

outputs together. Please ensure that the loudspeaker terminals have

been tightened completely to provide a good electrical connection. It is

also possible for the sound quality to be affected if the screw terminals

are loose.

Audio input types

The 851W features either unbalanced (phono/RCA) or balanced (XLR)

input connections. Either type may be used but not both at the same

time. The balanced connection is the higher quality option and can reject

noise and interference in the cable when used with other equipment

that supports this function. An XLR connector is wired Pin 1 - Ground; Pin

2 - Hot (in-phase); Pin 3 - Cold (phase-inverted).

Use the Left and Right Input Type switch (Item 4) to select the connection

type you wish to use. When using either the balanced or unbalanced

input, make sure that no cables or equipment are connected to the

unused input, as this may degrade operation. The unused input does

not need to be terminated and this should not be done.

2. Balanced Audio

For connection to the balanced XLR outputs of suitable pre-ampliers

that have this kind of output (such as our own 851E model). The pre-

amplier used should be capable of providing at least 1V rms of output

per phase (i.e. at both of + and – terminals of the XLR, more is also ne).

Nearly all modern pre-ampliers full this requirement.

3. Unbalanced Audio

For connection to the normal (single ended) RCA/Phono outputs of a

suitable pre-amplier (such as our own 851E model). The pre-amplier

used should be capable of providing at least 1V rms of output (more is

ne). Nearly all modern pre-ampliers full this requirement.

4. Input Type switch

Use to select a balanced or unbalanced connection type for the input.

5. Stereo/Mono mode switch

Switches the 851W between ‘normal’ Stereo operation (where one

851W is used for a pair of speakers) and Mono operation (where two

851W’s are used one for each speaker). Refer to later sections of this

manual for more information.

6. Mono mode switch

When Mono mode has been selected, switches the 851W between Bi-

amped Mono and Bridged Mono. Refer to later sections of this manual

for more information.

7. Control Bus

In - Allows un-modulated commands from multi-room systems or other

components to be received by the unit.

Out - Loop out for Control Bus commands to another unit.

The 851W can also be switched between On and Standby mode by

connecting the Control Bus output of an 851E pre-amplier to the

Control Bus input of the 851W. Refer to the ‘Power syncing’ section of

this manual for more information.

8. Trigger In, Out/Thru

For Custom Install use or with preamps and with trigger outputs, the

851W can be turned on and off (i.e. brought in and out of Standby

mode) by the presence of 5-12V DC at the Trigger input. A trigger input

will also produce an internally generated 12V DC trigger output at the

Output/Thru connection. Turning the 851W on from the front panel also

produces a 12V DC trigger output at the Output/Thru connection. This

can be used to turn on/Standby other connected power ampliers or

other equipment if desired. Refer to the ‘Power syncing’ section of this

manual for more information.

9. IR (Infra-Red) Emitter In

Allows modulated IR commands from multi-room systems or IR repeater

systems to be received by the unit. Commands received here are not

looped out of the Control Bus. Refer to the ‘Custom installation’ section

for more information.

10. AC power socket

Once you have completed all connections to the unit, plug the AC power

cable into an appropriate mains socket then switch on. Your unit is now

ready for use.

11. Power On/Off

Switches the unit on and off. If the 851W is not going to be used for long

periods of time it should be turned off using this switch.

12. Mains Voltage Selector Switch (CU version only)

Switches the 851W mains voltage between 100V and 115V.

Note: For use by Cambridge Audio service personnel only!

2 23 34 4

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